<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="img in imgList" :key="img.id">
        <img :src="img.imgUrl" :alt="img.imgName" @click="$bus.$emit('sentImgIndex', curImg)">
      </div>
    </div>
    <div class="swiper-button-prev" @click="leftPic" ></div>
    <div class="swiper-button-next" @click="rightPic"></div>
  </div>
</template>

<script>
import Swiper from 'swiper';

export default {
  name: "ImageList",
  props: ['imgList'],
  data() {
    return {
      curImg: 0,
    }
  },
  watch: {
    imgList() {
      this.$nextTick(()=> {
        new Swiper ('.swiper-container', {
          loop: true, // 循环模式选项
          slidesPerView: 3,// 显示多少图片
          slidesPerGroup : 2,// 每次轮流几个图片
          // 如果需要前进后退按钮
          navigation: {
            nextEl: '.swiper-button-next',
            prevEl: '.swiper-button-prev',
          },
          
        })        
      })
    }
  },
  methods:{
    leftPic() {
      if (this.curImg == 0) this.curImg = this.imgList.length - 1;
      this.$bus.$emit('sentImgIndex', --this.curImg);
    },
    rightPic() {
      if (this.curImg==this.imgList.length-1) this.curImg = 0;
      this.$bus.$emit('sentImgIndex', ++this.curImg);
    }
  }
}
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        &:hover {
          border: 2px solid #f60;
          padding: 1px;
        }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>